Combined liquid fuel and gas burner



Aug. 15, 1933. H. MEACHEM v COMBINED LIQUID FUEL AND GAS BURNER Filed Jan. 2, 1931 '3 Sheets-Sheet l Aug. 15, 1933.

' H. MEACHEM COMBINED LIQUID FUEL AND GAS BURNER Filed Jan. 1951 s Sheets-Sheet 2 avwomtoz MA /7095M Aug. 15, 1933- H. MEACHEM COMBINED LIQUID FUEL AND GAS BURNER Filed Jan. 2, 1931 3 Sheets-Sheet Snvemtoz HfiR RY MEFICHEM Patented Aug. .15, 1933 1,922,857 COMBINED LIQUID FUEL AND GAS BURNER Harry Meachem,

Teaneck, N. J., assignor to Todd Dry Dock, Engineering & Repair Corporation,

Brooklyn, N. Y.

Application January 2, 1931. Serial No. 506,087

This invention relates to combined gas and oil burners for use in furnaces where it is desirable to employ either gas or oil, as fuel, and my improvements are directed to means included in the burner equipment of a liquid fuel burning furnace, provided with an air register, whereby gas can be substituted for oil as the combustible medium; and the necessary air to support combustion of the gas flame is properly controlled.

In some localities where natural gas is available a furnace can be operated therewith more economically than with oil, and sometimes it is advantageous to have a furnace that is capable of operating successfully and efficiently with either liquid or gaseous fuel.

In adapting a liquid fuel burning furnace to the efiicient combustion of gaseous fuel I have provided a burner that is suited to the use of a fixed gas wherein the gas burner is located within, enveloping streams of coolingair.

Still further, my improvements comprehend the provision of burner supporting means in the form of vanes, that serve also to constitute an eflicient air cone when the fuel used is either oil or gas.

Also my improvements comprehend the provision of means whereby the burner can be drawn back into the register when the furnace is shut down, to be thereby removed from the influence of refractory heat, which otherwise would tend to warp or distort the burner. I

An important feature of my invention consists in providing axial means of support for the gas burner whereby the burner with its support ing vanes can be shifted back and forth with relation to the opening into the furnace, for the purpose of adjusting the gas flame with respect I to streams of entering air; and also, when the oil burner is in operation, enabling the cone formed by the vanes to be adjusted for the purpose of regulating the air supplied to the flame of said oil burner.

My improved gas burner, with its supporting vanes, is removable from the register in the same manner that the usual form of air cone is removable.

Other features and advantages of my invention will hereinafter appear.

In the drawings:

Figure 1 is a side sectional view of a furnace front; including the air register, oil burner, gas burner, and controlling means. i

Fig. 2 is a rear end view thereof.

Fig. 3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is a section on the line 44 of Fig. 5,

8 Claims. (Cl. 15811) and Fig. '5 is an end view of the its connecting vanes and collar. My invention is herein illustrated as applied to a Todd type oil burning apparatus, having the air register 1 which is attached to a furnace that is provided with the throat 2 of refractory material. An oil burner is shown as comprising the jacket 3, oil pipe 4, atomizer 5, and flame cone 6, which latter is adjustable as by means of the rod 7, and a Venturi air ring or mouth 8 that co-acts with throat 2, said air ring defining the gas burner with furnace opening.

The parts ref-erred to are usual in an oil burning apparatus, and the purpose of my present invention is to associate a gas burner therewith.

Therefore I provide a burner in the form of a hollow annulus 9,which is approximately pear shape in cross-section and is disposed concentrically between and spaced from the air ring 8 and flame cone 6, said annulus being connected 7 with a collar 10, that is slidable on jacket 3, which serves as a guide, by means of a series of radial webs 11, which webs may have the form of vanes adapted to direct the flow of air from the register into the furnace, said vanes being angled to constitute an air cone.

The inward portion or apex of the annulus 9 is pierced with orifices 12. for the issue of gas that is supplied to the annulus by piping which is in communication with a source of pressure supply (not shown); The piping may consist of a length or section 13 which connects with an outward portion 14 of the annulus, and swivel jointed connecting pipe lengths 15, 16, or other suitably flexible conduit means whereby the annulus 9 may be capable'of movement in an axial direction, as through the medium of an operating rod 1'7.

Now it will be apparent that the axially movable means for the annulus or gas burner 9 permitits adjustment to suit the most favorable conditions for air admixture and combustion.

Due to the fact that air from the register, in its flow path-to the furnace, completely envelops the burner 9, thereby said burner is prevented from becoming overheated while the furnace is in operation. When the furnace is shut down and air ceases to flow from the register, the

burner 9 is to be drawn back into the register, as shown in dotted lines, where it will be sufflciently distant from the influence of refractory heat from the furnace, which otherwise would tend'to warp or distort said burner.

It is to be understood that while I have illustrated my improved gas burner in association no may be equally well employed in conjunction with other types of air registers; also that while an air box 18 is herein shown, for operation under forced draft, the gas burner may also be used means for supplying gas to said burner.

under natural draft conditions.

The gas supply piping for the burner is caused to enter the register through a hole in the back plate 19, and the provision of this hole is the only change needed to be made to permit the installation of the gas burner in an air register employed with oil burning equipment.

It will be appreciated that the gas burner can be quickly installed or taken out of the register upon removal of the back plate.

Variations within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim:

1. The combination with an air register having an opening adapted to co-act with a furnace opening, of a liquid fuel burner disposed axially in said register, a plurality of curved vanes forming an air cone and mounted on said burner to be rhovable ,therealong, said cone serving to direct the flow of air for the combustion of fuel issuing from said burner, an annular gas burner carried by' said vanes, to be movable therewith, and means for supplying gas to said gas burner.

2. The combination with an air register having an opening adapted to co-act with a furnace opening, and a liquid fuel burner disposed axially in said register, of an annular gas burner in concentric relation with said liquid fuel burner, and air directing means mounted on said liquid fuel burner, said airdirecting means carrying said gas burner and being movable axially therewith.

3. The combination with an air register having an opening adapted to co-act with a furnace opening, said register having a Venturi ring at its opening, a liquid fuel burner disposed axially in said register, said .burner having a jacket, and a flame cone mounted on said-jacket, of an annular gas burner disposed concentrically intermediate said ring and flame cone, a collar mounted on said jacket to be movable therealong, and air directing vanes connecting said gas burner with said collar.

4. The combination with a furnace having a mouth and an air register adapted to co-act therewith, of a hollow, annular burner operatively disposed in concentric, spaced relation within the confines of said furnace mouth, said burner having orifices directed toward the furnace interior, means of axial adjustment for said burner, and

5. The combination with a furnace having a mouth and an air register adapted to co-act therewith, of a hollow, annular burner operatively disposed in concentric, spaced relation within the confines of said furnace mouth, said burner having orifices directed toward the furnace interior, supporting means for said burner permitting it to be moved between its operative position near the furnace mouth and the back part of the register,

and means for supplying gas to said burner.

6. The combination with a furnace having an inwardly constricted mouth and an air register adapted to co-act therewith, of a support axially disposed with respect to said register, a collar slidable on said axial support, radial webs extended from said collar, and a hollow, annular burner carried by said webs, said burner provided with orifices directed toward the furnace interior, and having gas supply means.

7. The combinationwith a furnace having a single central opening and,an air register adapted to co-act therewith, of a liquid fuel burner disposed axially in said register and concentrically with respect to said opening to discharge therethrough, an annular gas burner in concentric reovoid shape in cross-section, the smaller portion thereof being provided with orifices and directed toward the furnace interior, said gas burner being operatively disposed in spaced the confines of said air ring.

' HARRY MEACHEM.

relation within 

